KnowBe4 Blog

Keeping you informed. Keeping you aware.
Stay on top of the latest in human and agent security including social and prompt engineering, ransomware and phishing attacks.

Stu Sjouwerman

Founder and Executive Chairman

Stu Sjouwerman (pronounced “shower-man”) is the Founder and Executive Chairman of KnowBe4, Inc., which hosts the world’s most popular integrated security awareness training and simulated phishing platform, with over 54,000 organization customers and more than 50 million users. A serial entrepreneur and data security expert with 30 years in the IT industry, Stu was the co-founder of Inc. 500 company Sunbelt Software, a multiple award-winning anti-malware software company that was acquired in 2010.


Recent Posts

Iranian Phishing Campaigns Are Running Rampant

Researchers at Google’s Threat Analysis Group (TAG) are tracking phishing campaigns by the Iranian threat actor APT35 (also known as Charming Kitten). The attackers used compromised ...

Two-Thirds of Organizations Have Been a Target of Ransomware

The latest data reveals ransomware’s pervasiveness throughout every industry, size, and type of organization, confirming its’ place as the number one cyberthreat today - and a glaring ...

U.S. Treasury Puts Out New Advisory on Potential Sanctions Risks for Facilitating Ransomware Payments

An update to the October 2020 advisory, the U.S. Treasury warns companies to mitigate ransomware attacks rather than paying ransoms to threat actors that pose a threat to national ...

Hospitals Respond to Influx of Ransomware Attacks by Increasing Budgets

The ransomware onslaught on hospitals and healthcare organizations is being seen as the catalyst for boards to shift operational priorities and put more focus on cybersecurity initiatives.

A Novel Form of Homographic Attack

A phishing campaign is using mathematical symbols to impersonate Verizon’s logo, according to researchers at Verizon. The emails use either a red square root symbol or a logical NOR ...

U.K. Residents Experience a 116% Increase in Nuisance Calls, Texts, and Emails in 2021

New data from the U.K.’s Information Commissioner’s Office (ICO) shows a massive rise in the first six months of this year – and the belief that cyberattacks are to blame.

Warning: Cybercriminals Target Organizations Going Through M&A Activity

The changing of hands of significant amounts of money is enough reason to get the attention of cybercriminals. So, how can organizations prepare for what should be an expected series of ...

NIST on Phishing Awareness

People need to be conscious of the fact that anyone can fall for social engineering tactics, according to Shaneé Dawkins at NIST, the US National Institute of Standards and Technology. ...

Man Spends Thousands and is Exposed for Typosquatting with Cryptocurrency

A man in Brazil spent more than $200,000 on typosquatting domains between November 2020 and February 2021, the Washington Post reports. Typosquatting is a phishing technique in which ...